//
//  VisitorLoginView.swift
//  Swift-SinaWeibo
//
//  Created by 陈高健 on 15/12/12.
//  Copyright © 2015年 陈高健. All rights reserved.
//

import UIKit

//定义协议
@objc protocol VisitorLoginViewDelegate: NSObjectProtocol {

    //用户将要登陆
    optional func userWillLogin()
    //用户将要注册
    func userWillRegister()
}


class VisitorLoginView: UIView {

    weak var visitorViewDelegate: VisitorLoginViewDelegate?
    //
    func setupInfo(tipText: String, imageName: String?) {
        tipLabel.text = tipText
        if let name = imageName {
            circleView.image = UIImage(named: name)
            largeIcon.hidden = true
            bringSubviewToFront(circleView)
        }else{
            startAnimation()
        }
    }
    
    private func startAnimation() {
        let anim = CABasicAnimation(keyPath: "transform.rotation")
        anim.repeatCount = MAXFLOAT
        anim.duration = 20.0
        anim.toValue = 2 * M_PI
        anim.removedOnCompletion = false
        circleView.layer.addAnimation(anim, forKey: nil)
    }
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        setupUI()
    }

    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    private func setupUI() {
        addSubview(circleView)
        addSubview(backView)
        addSubview(largeIcon)
        addSubview(tipLabel)
        addSubview(registerBtn)
        addSubview(loginBtn)
    
        
        for subView in subviews {
            subView.translatesAutoresizingMaskIntoConstraints = false
        }
        addConstraint(NSLayoutConstraint(item: largeIcon, attribute: .CenterX, relatedBy: .Equal, toItem: self, attribute: .CenterX, multiplier: 1, constant: 0))
        
        addConstraint(NSLayoutConstraint(item: largeIcon, attribute: .CenterY, relatedBy: .Equal, toItem: self, attribute: .CenterY, multiplier: 1, constant: -60))
        
        //添加圆圈的约束
        addConstraint(NSLayoutConstraint(item: circleView, attribute: .CenterX, relatedBy: .Equal, toItem: largeIcon, attribute: .CenterX, multiplier: 1, constant: 0))
        
        addConstraint(NSLayoutConstraint(item: circleView, attribute: .CenterY, relatedBy: .Equal, toItem: largeIcon, attribute: .CenterY, multiplier: 1, constant: 0))
        
        
        addConstraint(NSLayoutConstraint(item: tipLabel, attribute: .CenterX, relatedBy: .Equal, toItem: circleView, attribute: .CenterX, multiplier: 1, constant: 0))
        addConstraint(NSLayoutConstraint(item: tipLabel, attribute: .Top, relatedBy: .Equal, toItem: circleView, attribute: .Bottom, multiplier: 1, constant: 16))
        //If your equation does not have a second view and attribute, use nil and NSLayoutAttributeNotAnAttribute.
        addConstraint(NSLayoutConstraint(item: tipLabel, attribute: .Width, relatedBy: .Equal, toItem: nil, attribute: .NotAnAttribute, multiplier: 1, constant: 230))
        addConstraint(NSLayoutConstraint(item: tipLabel, attribute: .Height, relatedBy: .Equal, toItem: nil, attribute: .NotAnAttribute, multiplier: 1, constant: 40))
        
        //按钮的约束
        
        addConstraint(NSLayoutConstraint(item: loginBtn, attribute: .Left, relatedBy: .Equal, toItem: tipLabel, attribute: .Left, multiplier: 1, constant: 0))
        addConstraint(NSLayoutConstraint(item: loginBtn, attribute: .Top, relatedBy: .Equal, toItem: tipLabel, attribute: .Bottom, multiplier: 1, constant: 20))
        //If your equation does not have a second view and attribute, use nil and NSLayoutAttributeNotAnAttribute.
        addConstraint(NSLayoutConstraint(item: loginBtn, attribute: .Width, relatedBy: .Equal, toItem: nil, attribute: .NotAnAttribute, multiplier: 1, constant: 100))
        addConstraint(NSLayoutConstraint(item: loginBtn, attribute: .Height, relatedBy: .Equal, toItem: nil, attribute: .NotAnAttribute, multiplier: 1, constant: 35))
        
        
        addConstraint(NSLayoutConstraint(item: registerBtn, attribute: .Right, relatedBy: .Equal, toItem: tipLabel, attribute: .Right, multiplier: 1, constant: 0))
        addConstraint(NSLayoutConstraint(item: registerBtn, attribute: .Top, relatedBy: .Equal, toItem: tipLabel, attribute: .Bottom, multiplier: 1, constant: 20))
        //If your equation does not have a second view and attribute, use nil and NSLayoutAttributeNotAnAttribute.
        addConstraint(NSLayoutConstraint(item: registerBtn, attribute: .Width, relatedBy: .Equal, toItem: nil, attribute: .NotAnAttribute, multiplier: 1, constant: 100))
        addConstraint(NSLayoutConstraint(item: registerBtn, attribute: .Height, relatedBy: .Equal, toItem: nil, attribute: .NotAnAttribute, multiplier: 1, constant: 35))
        
        //设置背景视图的约束 可视化的布局语言
        //OC 中可选项 一般使用 按位 或枚举选项  swift中直接指定数组
        //metrics:约束数值字典 [String: 数值],
        addConstraints(NSLayoutConstraint.constraintsWithVisualFormat("H:|-0-[backView]-0-|", options: [], metrics: nil, views: ["backView": backView]))
        
        addConstraints(NSLayoutConstraint.constraintsWithVisualFormat("V:|-0-[backView]-(-35)-[regBtn]", options: [], metrics: nil, views: ["backView": backView,"regBtn":registerBtn]))
        
        //设置视图的背景颜色
        //UIColor(white: <#T##CGFloat#>, alpha: <#T##CGFloat#>) 设置灰度颜色
        backgroundColor = UIColor(white: 0.93, alpha: 1)

        
        registerBtn.addTarget(self, action: "registerBtnDidClick", forControlEvents: .TouchUpInside)
        
        loginBtn.addTarget(self, action: "loginBtnDidClick", forControlEvents: .TouchUpInside)
    }
    
    //注册按钮的点击事件
    @objc private func registerBtnDidClick() {
        visitorViewDelegate?.userWillRegister()
    }
    
    //登陆按钮的点击事件
    @objc private func loginBtnDidClick() {
        visitorViewDelegate?.userWillLogin?()
    }
    
    //懒加载所有的子视图
    private lazy var backView: UIImageView = UIImageView(image: UIImage(named: "visitordiscover_feed_mask_smallicon"))
    private lazy var largeIcon:UIImageView = UIImageView(image: UIImage(named: "visitordiscover_feed_image_house"))
    private lazy var circleView:UIImageView = UIImageView(image: UIImage(named: "visitordiscover_feed_image_smallicon"))
    
    //设置中间消息
    private lazy var tipLabel: UILabel = {
        let l = UILabel()
        l.text = "关注一些人，回这里看看有什么惊喜,关注一些人，回这里看看有什么惊喜"
        l.textColor = UIColor.darkGrayColor()
        l.textAlignment = .Center
        l.font = UIFont.systemFontOfSize(14)
        l.numberOfLines = 0
        l.sizeToFit()
        return l
    }()
    
    //设置注册按钮的相关属性
    private lazy var registerBtn: UIButton = {
    
        let btn = UIButton()
        btn.setBackgroundImage(UIImage(named: "common_button_white_disable"), forState: .Normal)
        btn.setTitle("注册", forState: .Normal)
        btn.titleLabel?.font = UIFont.systemFontOfSize(15)
        btn.setTitleColor(UIColor.darkGrayColor(), forState: .Normal)
        btn.sizeToFit()
        return btn
    }()
    
    //设置登陆按钮的相关属性
    private lazy var loginBtn: UIButton = {
        let btn = UIButton()
        btn.setBackgroundImage(UIImage(imageLiteral: "common_button_white_disable"), forState: .Normal)
        btn.setTitle("登陆", forState: .Normal)
        btn.titleLabel?.font = UIFont.systemFontOfSize(15)
        btn.setTitleColor(UIColor.darkGrayColor(), forState: .Normal)
        btn.sizeToFit()
        return btn
    }()

}
